Roller-bearing



F. A. AND 1.1. KLAVON.

ROLLER BEARING.

APPLICAHON FILED MAY 22- I920. 1 372,146. Patented Man 22, 192k 2 SHEETS SHEET 1.

FIG HM I v I W/TNESSES k [L uvvmmwrs gzwm A flaw/ am F. A. AND J. J. KLAVON.

ROLLER BEARING.

APPLICATION FILED MAY22,1920.

Patented Mar. 22, 1921,

2 SHEETS 5HEE! 2.

FIG.YII.

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ki fw UNITED STATES PATENT OFFICE.

FRANK A. KLAVON AND JAMES J. KLAVOH, OF PITTSBURGH, IENNSYLVANIA.

ROLLER-BEARING.

Specification of Letters Patent.

Patented Mar. 22, 1921.

Application filed May 22, 1920. Serial No. 383,372.

To all whom it may concern Be it knownthat we, FRANK A. KLAVON and JAMES J. KLAVON, residing at Pittsburigh, in the county of Allegheny and State of ennsylvania, both citizens of'the United States, have invented or discovered certain new and useful Improvements in Roller- Bearings, of which improvements the following)is a specification.

ur mvention relates to improvements in roller bearings and is directed to improvements in durability and in efficiency.

It is illustrated in the accompanyin drawings. Figure I is a plan view and i II a view in vertical sectibn,-on the plane Indicated at II-II, Fig. I, of a head member of a cage for roller bearings. Fig. III is a view in perspective of a' bearing plate, a succession of which is a plied to each head member of the cage. 1g. IV is a view in perspective of a roller bearing in the simplest form in which our invention is practised. Fig. V is a like view of a tie bar for the cage. Fig. VI is a view in longitudinal section of the bearing structure complete, the bearing rollers in place in the cage, assembled with parts between which the bearing is arranged for service. Figs. VII, VIII, IX, and X illustrate various forins which the bearing roller itself may assume, and herein are fur-' ther s ecific features of invention. These four roller in side elevation, excepting only Fig. IX, which shows it in longitudinal section. Figs. XI and XII illustrate the invention gpplied to constitute a thrust bearin Fi being a view corresponding to of the bearin structure and shown "a shaft in proper re'ative position, and 1g. XII

being a lan view of the bearing structure. Figs. X II and XIV are views corresponding to Figs. XI and XII, and showing a modification in structure. 1

The structure as shown in Figa f-VI inclusive consists of a cage made up of opposite heads 1, tie bars 2, an bearin'gdplates of roller bearings 4. The hea, s 1 areconvenientl blanks eing ormed with lugs 5 which,

being bent to the shape indicated in the drawings, form separate confining spaces for gures last named show the bearing stam ed from sheet metal, the

. rivetin ,spot-welding, or in equiva ent manner. ach plate consists essentially of an outwardly convex, conveniently spherical boss 7, so arranged that, when the parts are assembled, the rollers at their op osite ends engage these bosses tangentially 1n the lines of their axes. The opposite ends of each 'roller l are rounded to spherical contour as indicated at 8.

.The structure thus far desoribed, in that it is provided with the convex bosses integral with the cage, is improved both in the matter of diminution of, friction, and in the matter of durability; the bearing of roller upon cage is concentrated in a polnt of contact, as distinguished from the usual more extended surface contact; the bodies which so make contact are hardened to the work; and the portions of the cage which receive the strain distribute it.

Another feature, which may be su oradded to that already described, is i ustrated in Figs. V-VII of the drawings, and it concerns the particular construction of the bearing roller. It is shaped, ,as these figurea'show to the superficial configuration of a succession of transverse ridges of curved cross section, specifically, as shown,

to the configuration of a helix of round 'wire. Preferably it is a helix of round.

;wrapped to a helix, the roller will possess and" to certain uses. In Fig. VI the roller wi l a; flexibility, such as to ads. t it peculiarl be seen to be a helix formed of round wire, wrapped upon ltself as a fore. Flexibility will manifestly be greater than in the case of a solid roller of equal over-all diameter.

It'will be carefully noted that the ends of the roller so formed are rounded at 8, to cooperate with the bearing plates 3 of the cage, as already described. The roller of Fig. VIII is essentially a coreless helix (and a whole possesses a flexibility whichit wouldv not possess if the core were continuous. Indeed, if desired the parts may be so proportioned that there is a vacant space left within the helix, and to that extent it is a coreless helix. And in consequence of the fact that it is hollow within, its flexibility is at a maximum. In Fig; IX the helix is in its formation coreless, as in Fig. VIII: a' removable and preferably one-piece core is inserted, in the form of a bolt 12; this bolt'is slightly orter than the helix, to afford terminal epressions which constitute seats for balls 11, and the ends of bolt 12 are preferably rounded. The balls 11 seated in the terminal depressions as shown in the drawing will bear in tangential contact upon the rounded ends'of bolt 12 and when the roller isassembled these balls will hear u on bosses 7 in the supporting frame. he roller of Fig. X is conical. In this instance the conical helix is in its formation coreless, as the helices of Figs. VIII and IX, and is provided with a removable core. in the form of a bolt which protrudes beyond the helix at opposite ends and is round-ended, to bear upon the bosses 7 of a cage. Manifestly these various features of' Figs. VII-X are interchangeable, with adaptations which are obvious, whether the conical rollers protrude, as the drawings show. This box is formed in two parts meetin in medial plane, and conveniently in the form of a bearing secure one to another by means of a boss. plate 7 arranged within around the outer wall. This bearing plate is of suitable dimensions and strength is formed of suitable hardened material an is round-faced inwardly as shown, to the end that the areas of contact between roller and plate shall be brou ht to and continue at a minimum. Fig. XI shows a shaft S with convex end engaging the bearing, and it will be understood that on the opposite side the rollers will bear upon a correspond- ;ng surface, to sustain the thrust.

4 igs. XIII and XIV show the same structure. except that the casing here is modified in its manner of formation. The box is not made of duplicate parts closing together in medial plane. but is an integral structure; one head 13 is formed as in Fig. XI, and the opposite head is formed by the bending over of the lugs 14. which ln s are formed integral with the head '13. he boss 7 is present. and in all other respects the struc- 215i? is the same as that of Figs. XI and in certain of the ensuing claims we define the bearing roller to be made of round wire coiled to a helix. In using the term round wire we do n t mean necessarily to be limited to a wire w ich istruly circular in cross section. It will be understood that all of the benefits and advanta herein described will be achieved in a h ix made of a wire of which the external surface is in cross section of convex curvature. Ordinarily a wire of circular section will be employed if only because it is readily obtainable and relatively inexpensive.

We have already intimated, and now repeat. that the various features of invention shown in alternative form are freely interchangeable. with such adaptations as are obvious: and it will further be understood that modification in details are permissible, within the limits defined in the ensuing claims.

We claim as our invention:

1. A hearing structure for rotary machine parts consisting of a cage and of a plurality of rollers borne in said cage, said cage including opposite heads formed of sheet metal and consisting each of a medial web andbent-up roller-retaining lips, and provided with hearing plates applied to the medial web in the intervals between the bent-up lips, substantially as described.

A bearing Structure for rotary machine parts including a cage, a convex boss borne y said cage, a bearmg roller formed of a central convex-ended core'and an enveloping helix extending beyond the end of the core and formin with the core a terminal ball seat and aImll arranged within such seat and bearing upon the convex boss borne by said cage, substantially as described.

3. A roller bearin of which the individual roller consists o a helix of round wire adapted to make tangential contact with a bearing surface, and responsive by virtue of leave the helix flexible at an intermediate 10 its hollow core to flexure strains, substanpoint to flexure strains. tially as described. 7 In testimony whereof We have hereunto 4. A roller bearing of Which the individset our hands. I 5 ual roller consists of a helix of round Wire FRANK A. KLAvoN. adapted to make tangential contact With a bearing surface and provided With terminal v JAMES KLAYVON bearing bolts whose shanks entering the 1101- Witness:

10W core of the helix from opposite ends FRANCIS J. ToMAssoN. 

